CN-121974422-A - Wastewater evaporation system of in-situ leaching mine hydrometallurgy plant and construction method thereof

CN121974422ACN 121974422 ACN121974422 ACN 121974422ACN-121974422-A

Abstract

The invention provides a wastewater evaporation system of an in-situ leaching mine hydrometallurgy plant and a construction method thereof, belonging to the technical field of wastewater treatment, wherein the evaporation system comprises an evaporation tank and a plurality of evaporation frames floating on the liquid surface of the evaporation tank; the evaporation frame comprises a rectangular floating frame formed by four side plates, vent holes are formed in the outer parts of liquid surfaces at the upper parts of the four side plates, corner supports are respectively arranged at four corners of the floating frame, fixing bolts are arranged in the middle of each corner support, upper and lower fixing cables are connected between the ends of the fixing bolts of two adjacent corner supports, upper and lower hanging cables are connected in parallel between the upper and lower fixing cables, and evaporation strips are arranged on the upper and lower hanging cables in parallel. The wastewater evaporation system for the in-situ leaching mine hydrometallurgy plant and the construction method thereof provided by the invention have the advantages of high evaporation efficiency, environmental protection, no energy consumption and wide application conditions.

Inventors

GUO DAPING
LI YULEI
HU LIANGCAI
ZHANG NING
YU BAOMIN
SUN GANGYOU

Assignees

中核第四研究设计工程有限公司

Dates

Publication Date: 20260505
Application Date: 20260126

Claims (10)

1. An in-situ leaching mining hydrometallurgy plant wastewater evaporation system, comprising: An evaporation tank and a plurality of evaporation frames floating on the liquid surface of the evaporation tank; the evaporation frame comprises a rectangular floating frame formed by four side plates, and vent holes are formed in the outer parts of liquid surfaces at the upper parts of the four side plates; The four corners of the floating frame are respectively provided with a corner support, the middle parts of the corner supports are provided with fixing bolts, upper fixing cables are connected between the fixing bolt ends of the upper parts of two adjacent corner supports, lower fixing cables are connected between the fixing bolt ends of the lower parts of two adjacent corner supports, upper suspension cables are connected between the upper fixing cables in parallel, and lower suspension cables parallel to the upper suspension cables are connected between the lower fixing cables; An evaporation strip made of porous materials is arranged between the upper suspension cable and the lower suspension cable in parallel through an evaporation strip fixing device, the middle part of the evaporation strip is fixed on the upper suspension cable, two ends of the evaporation strip are respectively fixed on two adjacent lower suspension cables at the lower part of the upper suspension cable, and two ends of the evaporation strip hang under the liquid level of the evaporation pool; The direction in which the upper suspension cable and the lower suspension cable are arranged in parallel is perpendicular to the wind direction of the maximum wind frequency, and the parallel evaporation strips face the wind direction of the maximum wind frequency.
2. The wastewater evaporation system of an in-situ leaching mining hydrometallurgy plant according to claim 1, wherein the floating frame is 4.0-10.0 m in length and 4.0-6.0 m in width, the side plates are 6-25 cm in thickness, and the height of the side plates is 35-80 cm.
3. The wastewater evaporation system of the in-situ leaching mining hydrometallurgy plant according to claim 2, wherein the projection plane of the angle brace is an isosceles right triangle, the right-angle side length of the angle brace is 10 cm-80 cm, the thickness of the angle brace is 25 cm-70 cm, and a mounting hole which penetrates up and down and is used for mounting the fixing bolt is arranged in the middle of the angle brace.
4. The wastewater evaporation system for an in-situ leaching mining hydrometallurgy plant according to claim 3, wherein the fixing bolt comprises a nut and a screw, the outer diameter of a screw body of the nut is matched with the inner diameter of the mounting hole, the screw body of the nut is of a tubular hollow structure and is provided with an internal thread, the outer diameter of the screw body of the screw is matched with the inner diameter of the tubular hollow structure of the nut and is provided with an external thread, the nut is installed in the mounting hole from one surface of the gusset, the screw is in threaded connection with the nut from the other surface of the gusset, grooves are circumferentially formed in the middle parts of the side surfaces of the nut head of the nut and the screw head of the screw, and the nut and the screw are fixedly connected with the upper fixing cable and the lower fixing cable through the grooves.
5. The wastewater evaporation system for an in-situ leaching mining hydrometallurgy plant according to claim 4, wherein a distance between the upper fixing cable and the lower fixing cable is 30 cm-75 cm, the upper hanging cables are arranged in parallel at equal intervals of 5 cm-20 cm, and the lower hanging cables are arranged in parallel at equal intervals of 5 cm-20 cm.
6. The wastewater evaporation system for an in-situ leaching mining hydrometallurgy plant according to claim 5, wherein the thickness of the evaporation strips is not less than 2.1mm, the parallel spacing between the evaporation strips is 5 cm-20 cm, the width of the evaporation strips is 2 cm-40 cm, the length of the evaporation strips is 110 cm-130 cm, the length of a single side of the evaporation strips on the liquid surface is 5 cm-15 cm, and the length of the single side of the evaporation strips below the liquid surface is 50cm.
7. The wastewater evaporation system of the in-situ leaching mining hydrometallurgy plant according to claim 6, wherein the evaporation strip fixing device comprises a clamping groove and a buckle, a first connecting through hole matched with the outer diameter of the upper hanging cable is formed in the axial line of the clamping groove, the clamping groove is connected to the upper hanging cable through the first connecting hole, a fixing groove matched with the width of the evaporation strip is formed in the outer surface of the clamping groove, a second connecting through hole matched with the outer diameter of the lower hanging cable is formed in the axial line of the buckle, the buckle is connected to the lower hanging cable through the second connecting through hole, and a bayonet matched with the width of the evaporation strip is formed in the outer side of the buckle.
8. The wastewater evaporation system of the in-situ leaching mining hydrometallurgy plant of claim 7, wherein the floating frame is a light hollow rectangular frame structure manufactured by a rotational molding process, the angle support and the floating frame are manufactured in an integrated mode, and the floating frame and the angle support are made of high-density polyethylene or linear low-density polyethylene materials; The fixing bolt is of a light hollow structure manufactured by a rotational molding process, and is made of high-density polyethylene material; The upper fixing cable and the lower fixing cable are made of ultra-high molecular weight polyethylene fiber materials or polyester fiber materials; The upper suspension cable and the lower suspension cable are made of ultra-high molecular weight polyethylene fiber materials or polyester fiber materials; The clamping grooves and the buckles of the evaporation strip fixing device are made of high-density polyethylene materials; the evaporation strip is made of polyester, polypropylene or polyester non-woven geotextile with filaments or short filaments.
9. A method of constructing a wastewater evaporation system for an in-situ leaching mining hydrometallurgy plant according to any one of claims 1 to 8, comprising the steps of: collecting annual average evaporation capacity and rainfall capacity of a hydrometallurgy plant area, wastewater discharge duration of the hydrometallurgy plant, discharge flow and a planned evaporation pond area; calculating the number of evaporation strips arranged in the evaporation frame according to the preliminarily drawn basic technical parameters of the evaporation frame, and determining the height of the floating frame, the width of the side plate of the floating frame and the size of the reserved holes of the floating frame through buoyancy calculation; According to the additional evaporation capacity empirical formula that a single evaporation stand can provide: calculating to obtain the additional evaporation capacity which can be provided by a single evaporation frame; The device comprises an EM (effective evaporation) and an S (metal ion exchange) evaporation frame, wherein the EM is an additional evaporation capacity which can be provided by a single evaporation frame, m 3 /a, n is the number of evaporation strips in the single evaporation frame, A is the area of the single evaporation strip, m 2 /strip, E is the local evaporation capacity, m/a, l is the parallel interval of the evaporation strips, m is the value range of 0.05 m-0.2 m, b is the width of the evaporation strips, m is the value range of 0.02 m-0.4 m, t is the transverse interval of a clamping groove at the top of the evaporation strips, m is the value range of 0.05 m-0.2 m, S is the horizontal projection area of a floating frame of the evaporation frame, and m 2 ; and determining the number of evaporation frames required to be put into the evaporation pond according to the area of the evaporation pond to be built, the wastewater discharge amount, the annual net evaporation amount and the additional evaporation amount which can be provided by a single evaporation frame, so as to form a final evaporation system.
10. The method for constructing a wastewater evaporation system for an in-situ leaching mining hydrometallurgy plant according to claim 9, wherein the basic technical parameters of the evaporation frame include the size of the floating frame, the length and width of the evaporation strips, the parallel spacing of the evaporation strips and the transverse spacing of the clamping grooves at the tops of the evaporation strips.

Description

Wastewater evaporation system of in-situ leaching mine hydrometallurgy plant and construction method thereof Technical Field The invention relates to the technical field of wastewater treatment, in particular to a wastewater evaporation system of an in-situ leaching mine hydrometallurgy plant and a construction method thereof. Background While some in-situ leaching mine hydrometallurgy plants in mineral industry in China can generate a large amount of wastewater during operation, the current method for accommodating and treating the wastewater in industry mainly depends on evaporation pond facilities, namely, a natural evaporation method is adopted to realize zero emission of wastewater. The area of the evaporation pond is determined by the ratio of the annual total wastewater discharge amount to the net evaporation amount of the project area, and the natural evaporation amount is reduced to a certain extent in calculation so as to ensure that the evaporation capacity of the evaporation pond is kept with enough safety margin. The depth of the evaporation pond is determined by calculating the water balance of the waste liquid discharge amount, evaporation amount and rainfall amount of each month. The structure of the evaporation pond basically adopts a digging and filling combination mode, firstly, a certain depth is dug downwards from the ground to form a bottom pond body according to the calculated designed evaporation area, and then the dug earthwork is utilized to fill a dyke around the pond body to form the evaporation pond body with the designed depth. The interior of the evaporation tank is generally divided into a plurality of evaporation units, an impermeable layer and a protective layer are paved on the bottom and the wall surfaces of the evaporation tank, and polluted wastewater is discharged into the evaporation tank through a pipeline. At present, the method of treating the wastewater of the hydrometallurgy plant by the field leaching mine in the mineral industry mainly adopts a planar evaporation pond, and the evaporation pond with a quite large area needs to be built to form enough evaporation capacity. In order to improve the evaporation efficiency of the evaporation pond, the technology for accelerating the evaporation capacity of the evaporation pond adopted at home at present mainly comprises methods of arranging an atomization device, a heating device, a blowing device, a compound device, an evaporation frame or/and a passive acceleration device and the like in the evaporation pond. Most of the methods can realize a certain degree of accelerated evaporation effect under the condition of continuous power consumption, are difficult to put into use in a large area, and have larger uncertainty in benefit cost. The method of arranging the passive accelerating device in the evaporation pond realizes a certain improvement of evaporation efficiency under the condition of not generating extra energy consumption by using a material which evaporates rapidly or a structure which is beneficial to evaporation, but the improvement degree is usually limited. Therefore, there is a need for an efficient, environmentally friendly, energy-free and widely applicable wastewater evaporation system for a leaching mine hydrometallurgy plant and a construction method thereof. Disclosure of Invention The invention aims to solve the technical problem of providing an efficient, environment-friendly, energy-consumption-free and widely applicable wastewater evaporation system for an on-site leaching mine hydrometallurgy plant and a construction method thereof. In order to solve the technical problems, the invention provides a wastewater evaporation system of an in-situ leaching mining hydrometallurgy plant, which comprises: An evaporation tank and a plurality of evaporation frames floating on the liquid surface of the evaporation tank; the evaporation frame comprises a rectangular floating frame formed by four side plates, and vent holes are formed in the outer parts of liquid surfaces at the upper parts of the four side plates; The four corners of the floating frame are respectively provided with a corner support, the middle parts of the corner supports are provided with fixing bolts, upper fixing cables are connected between the fixing bolt ends of the upper parts of two adjacent corner supports, lower fixing cables are connected between the fixing bolt ends of the lower parts of two adjacent corner supports, upper suspension cables are connected between the upper fixing cables in parallel, and lower suspension cables parallel to the upper suspension cables are connected between the lower fixing cables; An evaporation strip made of porous materials is arranged between the upper suspension cable and the lower suspension cable in parallel through an evaporation strip fixing device, the middle part of the evaporation strip is fixed on the upper suspension cable, two ends of the evaporation strip are respectively fixed o